Gas spills...leaky cap

Discussion in 'Motorized Bicycle Welding, Fabrication and Paintin' started by RedB66, Jan 24, 2008.

  1. SmokingDog

    SmokingDog New Member

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    One of the hobbies I had to put aside when I got into these darn bikes was RC. I've painted a few planes with Rustolem with good results, and I think hot nitromethane has got to be worse on paint than gas.

    The trick was to let the paint cure before exposing it to the fuel, in the case of ROem it was two weeks. After that it was fine.
     
  2. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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    I've painted nitro powered models with "regular paint" from a spray can with good results....the same "technique"- let the paint dry!
     
  3. Egor

    Egor New Member

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    The best paint is the touch up colors for cars at the parts shop. Next is the Krylon with the high heat clear, this works well over all the paint. You will not find Rustoleum good for anything but the yard chairs. Make a gasket for your cap using leather. Have fun Dave
     
  4. SmokingDog

    SmokingDog New Member

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    I agree... And it is amazing how well that "yard chair" flies!:D
     
  5. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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    Always spray the cans upside down until the paint stops coming out when you are done painting for more than 15 minutes.
     
  6. silvermaker5

    silvermaker5 New Member

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    I have had the same trobles. Thanks for all the tips.
     
  7. SmokingDog

    SmokingDog New Member

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    Update:

    Sprayed it, let it set two days, put it back together and rode it...

    So far the engine, rattle-can-paint is holding up.
     
  8. misteright1_99

    misteright1_99 New Member

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    Painted mine with rattle can paint, then ratlle can clear laquer, followed by 3 coats of rolled on polyurathane out of a can/ Spilled gas on it filling tank (dumb) and no problems...I did the poly to seal the decal and make the tank smooth with decal under poly........
     

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  9. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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    I used Krylon flat O.D. green and no sealer coat and the gas never did anything but make some very slight, mild staining around the cap. (which actually gave the "Military Bike" more character.)
     
  10. sojudave

    sojudave New Member

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    I usually use, engine paint. It has ceramic in it, is fuel resistant and heat resistant up to 500 degrees (silver can) or 1000 degress (gold can). If you prefer to not use any of the colors available, then be sure to a can of automotive clear coat. It will be fuel resistant too.
     
  11. Goat Herder

    Goat Herder Gutter Rider

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    Heres whats happening the seam at the tank where the cap goes leaks most of the time in my opinion. Paint it up paint it good use a can maby sand the blemishes out use another can. The idea? Engine paint dos not care if gas touches it. Now this means you have a sealer that = a tank that will not leak . The paint will not blemish from the gas its good paint, gas will not tarnish your purty shine. Paint your studs really well at the base as most of these tanks will leak here eventually. Mask your studs so the nuts can be threaded back on without cursing. Double gasket your cap tripple gasket your cap if it helps, but do drill a 1/8 hole maby very slightly smaller in the center of your gas cap. Your tank needs to breath so does your ch. Hope this helps!!!!!! A good high temp engine paint is to me like sealing the entire tank with epoxy()
     
  12. Goat Herder

    Goat Herder Gutter Rider

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    Theres always a pontential to make it leak just ly the bike sideways or worse yet wreck someware. Bottom line needs to breath. My heads not working its late trying to think of a slightly smaller hole than the 1/8 for the center of the gas cap. Hope someone gets my idea lol God Bless!:crash:
     
  13. Goat Herder

    Goat Herder Gutter Rider

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    One more thing somone here I can't remmember where on the forum used a inside pre tank for ya filled it yet sealer? There was a air craft tested brand? They said it was good stuff. I'am not in the air yet not worryed lol. Gots to learn me a spell checker:p
     
  14. ibcnya

    ibcnya New Member

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    So what if we had a better sealed cap with a 1/8" vent tube like Quads(4wheelers) have. I was going over this with a friend of mine just last night.
     
  15. MotorGator

    MotorGator New Member

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    Hi RedB.....

    Something discovered on the St. Pete ride from the guy who was having clutch shaft problems (Jim's buddy). He figured out that an oil fill cap that fits the Chevy engine was a perfect match and that he did a double rubber gasket number on. No more leaks. He said it was an easy find at the local auto parts store. Inexpensive too.
     
  16. Dave31

    Dave31 Moderator
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    It will also work with a ford one...I think the old ford/chevy metal ones would be better.

    I did a butcher job but I wanted to see if it would work. It seals just fine and with a hose for the breather I do not see why it would not work.

    First pic is before, second is after the mod
     

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    #36 Dave31, Feb 7, 2009
    Last edited: Feb 7, 2009
  17. Salty Gator

    Salty Gator New Member

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    remote filler cap hidden downframe
    cvlt1
     

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